HMM...you could come close to that with a digi-mod ua-5. Buy a stock one, and then digi-mod it yourself. If you can't figure out how to do it, I can do it for you if you need it. Other than that, I am not sure what other options you would have without going ultra cheap with the box mentioned in the yard sale section this morning. If it was my money, I would get the ua-5, mod it myself as I think you might find other uses for it (matrix tapes) as well. You could even use it as a soundcard, but I don't believe it is deemed bit perfect on the digi in.
Hope this helps.
Daryan